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[Yuv <679697@xxxxxxxxxxxxxxxxxx>]

** Tags added: gsoc

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https://bugs.launchpad.net/bugs/679697

Title:
  Support sorting by local-ID in CP list window

Status in Hugin - Panorama Tools GUI:
  Triaged

Bug description:
  Refreshing the CP panel can slow down hugin by a lot when there are a
  lot of control points. The optimizer also works slowly when there are
  excessive control points.  Other times, the optimizer doesn't work so
  well when some images have a hundred control points and other have a
  handful. That situations can occur when a machine doesn't have enough
  RAM to run a autopanosift on all images simultaneously.  In all of
  these cases, we can solve the problem if the CP window can sort by
  localID.

  Just sort, then select all control points beyond 20, and then delete.
  This also makes the CP list behave more uniformily, more columns can
  be sorted upon. I am attaching a patch that adds this behavior to
  hugin.